All Questions
Tagged with standard-model quantum-mechanics
34
questions
21
votes
8
answers
4k
views
Do we understand chemistry from particle physics?
My chemistry knowledge is of a high-school level. In high-school, the properties of atoms were mostly presented as empirical phenomena. We learned some physical principles such as the idea that ...
- 1,778
3
votes
3
answers
571
views
Is there an experiment showing that general relativity and the standard model contradict each other?
My friends and I are asking this question about the standard model and general relativity to put the discussion on a firmer footing:
Does some experiment show that the two theories contradict each ...
- 727
0
votes
3
answers
77
views
How probabilistic quantum mechanics explains why all free electrons at rest are identical?
All photons are not identical varying with wavelength.
However all free electrons in our Universe at rest are identical having all the same exact Compton wavelength, ~511KeV energy, spin magnetic ...
- 4,170
0
votes
0
answers
125
views
Can classical mechanics be derived from the standard model of particle physics?
Is there a way in which starting from the standard model, and performing a series of steps, classical mechanics can be derived? I'm curious if the equations of motion, whether Newtonian, Lagrangian or ...
- 1,092
0
votes
0
answers
74
views
When Higgs mechanism occurred ? Or it occurs everytime?
I’m studying SSB and the Higgs mechanism, and I’m having a few doubts about when Higgs mechanism occurred. From my knowledge, all particles were created massless, and they gain mass after SSB. What I ...
- 123
1
vote
0
answers
28
views
Correlation of the strong force with fractional charges? [duplicate]
As far as we know the quarks are not free not because of their fractional charges but because of the independent strong force interaction that grows with distance within the radius of the proton or ...
- 4,170
1
vote
1
answer
109
views
Loss of quantum coherence due to gravity [closed]
Consider a particle which moving inside a gravitational field.Will it lose its quantum coherence?
According to GR , the particle will follow a geodesic but if it does then shouldn't its wavefunction ...
user311169
0
votes
0
answers
57
views
Regarding the exchange of gluons between quarks and the Pauli exclusion principle
When the quarks in a hadron exchange gluons, for a tiny fraction of a second two of the quarks in the hadron have the same colour charge, thus violating the Pauli exclusion principle. Does this mean ...
user305257
0
votes
0
answers
82
views
Understanding SUSY, Lie groups, gauge theory, etc [duplicate]
We are currently learning about the Standard Model, but we had no lectures on the above topics, therefore it is very hard for me to understand how symmetries play a role in the Standard Model and why ...
0
votes
1
answer
64
views
Is there any relationship between the recent LHCb results on lepton universality violation and Bells Ineqalities? [closed]
Link to article re LHCb results
As a layperson, my knowledge is limited to what i can understand from pop sci books. Having recently read about (although not quite understood!) Bells Theorem, it ...
- 25
0
votes
1
answer
106
views
Which chemical potentials are important?
Reading this SE post and some others, the following question popped up in my mind: in order to faithfully describe a relativistic quantum system with statistical mechanics/thermodynamics, which ...
0
votes
1
answer
179
views
Interaction of quantum fields [closed]
Do quantum fields in QFT interact with each other constantly and continuously, or only from time to time?
- 956
1
vote
1
answer
93
views
How do weak interactions maintain thermal equilibrium in the early universe?
When reading about why SM neutrinos are not a candidate for DM, it was stated:
"Neutrinos are involved in weak interactions that keep them in thermal equilibrium in the early Universe down to the ...
- 109
5
votes
1
answer
577
views
Why protons are stable but Neutrons not?
just read something about standard model and find it very interesting, proton is made of there subatomic particle U,U,D and neutron have U,D,D .
electromagnetic force between U,U,D wants to rip apart ...
- 121
0
votes
2
answers
686
views
Upper limit on electron radius vs photon radius
Both electrons and photons are defined in the SM as point-like particles. The electron does have rest mass while the photon is massless.
Now if I search for the upper limit on the size of the ...
- 29k